Sheet-piling.



- `LUTHER P. FRIESTEDT,

NITED STATES Patented .'ruiy 2s, 190e. v

y OF CHICAGO, ILLINOIS.

sHEEAT-PILING.

SPECIFICATION forming part o'f Letters Patent No. 734,843, dated J'u1y`28, 1903.

Application led May 21, 1903. Serial No. 158,110. (No model.) l l 1 To a/ZZ whom itV may concern.-`

Be it known that I, `LUTHER P. FRIESTEDT,

. a citizen of theUnited States, residing at Chicago, in the county of Cook and State of Illinois; have invented certain `new and useful Improvements in Sheet Piling; i and I do hereby declare the following to be a full,clear, and exact descriptionA of the invention, such as will enable others skilled in the art to which it appertains to make and'use thesame.

This invention relates to improvements in metal sheet-piling to be used for various purposes, and has` for its object to provide an improved arrangement for retaining the Adifferent sections in their joint relation in forming a continuous wall structure.

In the drawings, Figure l is a plan of a portion of a wall structure embodying the improved features. Fig. 2 is anelevation in perspective ofa single beam-section, showing the back side thereof. Fig. 3`is a similar view, but showing the channel or face side of a beam-section; and Fig. 4 is a view in perspective of a wedge-piece looking at the flatv or face side thereof.

The form of rolled beam used is preferably of the channel pattern; but any other form may be employed that will be practical in connection with the improved features to be hereinafter set forth.

The interlocking channel beam-sections entering into the wall structure are arranged in the alternate manner shown in Fig. l, the section A being set with the fiianges 5 turned in one direction and the section B With the flanges 6 turned in the opposite direction, the

adjacent flanges of the edgewise-assembled beams interlocking with each other.

The beam-sections have anumber of Wedgepieces C secured tothe back side and adjacent to one edge thereof. These wedge-pieces will beof the double form and shape best shown in Fig. 4 and are rigidly secured in place,

usually by means ofrivets, apertures 7 being e next wedges are mounted on the Vjoining back edge of section B, and then again on the back interlocking edge of the succeeding beam-section A, and so on throughout the series of sections, bringing the wedges on the alternating beams into a diagonal relation, so as to locate them first on one side of the wall and lof the material in condition t0 be used over again, thedouble wedge not presenting as great a resistance to the pulling power as the head end of the ordinary wedge would. 1n structures of a permanent character an ordinary single wedge may be used, the head end of which would be of the form indicated by the rectangular diagrammatic lines in Fig. 4.

When the beam-sections are driven, the pressure on the wedge-surfaces from the earthwalls will `be somewhat excessive and the joining edges of the beams constantly held orforced together from each side toward a common center and locked against possible lateral separation.

Angle-irons are employed in-connection with the frictional wedging system, as will be next described.

The beam-sections are eachprovided with an angle-iron D, riveted to the face or channel sides and which prevents ,any edgewise play thereof. The angle-irons are of a length corresponding to that of the sections and alsov serve as guides in the operation of assembling and driving. The angle-irons are so disposed that the free flanges 11 contact the beamflange adjacent to the position of the wedgepieces in coacting therewith, By this arrangement a locking and guide groove isprovided between the free flange of each angleiron and the adjacent beam-fiange alternately on each side of the wall structure, and thus simplifies the construction by being able to .ret-ain lthe beam-sections in their joint relation by using but one angle-iron on each beam and having the wedging-surfaces on but one edge or corner of the respective beam-sections. If the character of the Work is such as to require it,tWo angle-irons may be used on each beam-section and wedge-pieces mounted on both edges of each section. Ordinarily the single arrangement shown will be sufficient and saves both in material and labor.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

l. A metal sheet-piling, comprising beamsections assembled edgewise in forming a solid wall structure, and means carried by the respective sections for receiving a direct lateral pressure on both sides of the structure from contact with the earth walls in retaining the sections in their joint relation during the operation of driving, substantially as set forth.

2. A metal sheet-piling, comprising beamsections assembled edgewise in forming a continuous wall structure, and means mounted on each section for exerting an excessive inward pressure on both sides of the wall on a line at right angles thereto when forced into the earth and holding the sections in their edgewise engagement7 substantially as set forth.

3. A metal sheet-piling, comprising channel beam-sections assembled edgewise so that the flanged edges will interlock, a number of angle-irons located on the channel side and adjacent to the edges thereof and rigidly secured in place, and means carried 'by each beam-section for transmitting theearth pressure on each side of the wall structure in forcing the flanged edges together and holding the same in-close parallel engagement, substantially as set forth.

4. In metal sheet-piling, a channel beamsection, and an angle-iron rigidly secured to the channel side thereof and having one flange extending parallel with the adjacent beamflange and providing a guide groove or space between the two flanges for the engagement of the flanged edge of the next succeeding beam-section, substantially as set forth.

5. In metal sheet-pilinga channel beamsection, and angle-irons rigidly secured to the channel side thereof and having its free flange extending parallel with the beam-flange and providing a longitudinal space therebetween for the engagement of the flanged edge of the next succeeding section in assembling the beams in a wall structure, and the wedgepieces carried by each section in exerting an inward retaining force from the pressure of the earth walls, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

LUTHER P. FRIESTEDT.

Witnesses:

L. M. FREEMAN, L. B. COUPLAND. 

